1
|
Jin ML, Park S, Kweon H, Koh HJ, Gao M, Tang C, Cho SY, Kim Y, Zhang S, Li X, Shin K, Fu A, Jung HT, Ahn CW, Kim DH. Scalable Superior Chemical Sensing Performance of Stretchable Ionotronic Skin via a π-Hole Receptor Effect. Adv Mater 2021; 33:e2007605. [PMID: 33599041 DOI: 10.1002/adma.202007605] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/27/2020] [Indexed: 06/12/2023]
Abstract
Skin-attachable gas sensors provide a next-generation wearable platform for real-time protection of human health by monitoring environmental and physiological chemicals. However, the creation of skin-like wearable gas sensors, possessing high sensitivity, selectivity, stability, and scalability (4S) simultaneously, has been a big challenge. Here, an ionotronic gas-sensing sticker (IGS) is demonstrated, implemented with free-standing polymer electrolyte (ionic thermoplastic polyurethane, i-TPU) as a sensing channel and inkjet-printed stretchable carbon nanotube electrodes, which enables the IGS to exhibit high sensitivity, selectivity, stability (against mechanical stress, humidity, and temperature), and scalable fabrication, simultaneously. The IGS demonstrates reliable sensing capability against nitrogen dioxide molecules under not only harsh mechanical stress (cyclic bending with the radius of curvature of 1 mm and cyclic straining at 50%), but also environmental conditions (thermal aging from -45 to 125 °C for 1000 cycles and humidity aging for 24 h at 85% relative humidity). Further, through systematic experiments and theoretical calculations, a π-hole receptor mechanism is proposed, which can effectively elucidate the origin of the high sensitivity (up to parts per billion level) and selectivity of the ionotronic sensing system. Consequently, this work provides a guideline for the design of ionotronic materials for the achievement of high-performance and skin-attachable gas-sensor platforms.
Collapse
Affiliation(s)
- Ming Liang Jin
- Institute for Future, Automation School of Qingdao University, Qingdao, 266071, China
- Shandong Key Laboratory of Industrial Control Technology, Automation School of Qingdao University, Qingdao, 266071, China
| | - Sangsik Park
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Hyukmin Kweon
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Hyeong-Jun Koh
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
| | - Min Gao
- Institute of Microengineering, École Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b, Neuchâtel, 2000, Switzerland
| | - Chao Tang
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Soo-Yeon Cho
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Yunpyo Kim
- Department of Chemistry and Institute of Biological Interfaces, Sogang University, Seoul, 04107, Republic of Korea
| | - Shuye Zhang
- State Key Laboratory of Advanced Welding and Jointing, Harbin Institute of Technology, Harbin, 150001, China
| | - Xinlin Li
- College of Electromechanical Engineering, Qingdao University, Qingdao, 266071, China
| | - Kwanwoo Shin
- Department of Chemistry and Institute of Biological Interfaces, Sogang University, Seoul, 04107, Republic of Korea
| | - Aiping Fu
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, China
| | - Hee-Tae Jung
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
| | - Chi Won Ahn
- Department of Nano-Structured Materials Research, National NanoFab Center (NNFC), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-338, Republic of Korea
| | - Do Hwan Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
- Institute of Nano Science and Technology, Seoul, 04763, Republic of Korea
| |
Collapse
|